Keep merge card buttons from wrapping on iPhone

mac/Sources/Byre/Attention.swift

@@ -50,10 +50,21 @@ struct AttentionReply<Leading: View, Trailing: View>: View {
     var body: some View {
         VStack(alignment: .leading, spacing: 6) {
             OtherEntry(key: key, placeholder: placeholder, busy: busy, focus: focus, send: send)
-            HStack(spacing: 8) {
+            ViewThatFits(in: .horizontal) {
-                leading
+                HStack(spacing: 8) {
-                Spacer(minLength: 0)
+                    leading
-                trailing
+                    Spacer(minLength: 0)
+                    trailing
+                }
+                VStack(alignment: .trailing, spacing: 6) {
+                    HStack(spacing: 8) {
+                        leading
+                        Spacer(minLength: 0)
+                    }
+                    HStack(spacing: 8) {
+                        trailing
+                    }
+                }
             }
             .disabled(busy)
         }